Scientist injecting influenza virus (family Orthomyxoviridae) into fertilised chicken (Gallus gallus domesticus) eggs. Following injection, the viruses grow and multiply within the chicken cells. This is a common means of growing influenza viruses, which is done for multiple purposes, including flu vaccine production.

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Photo credit: © James Gathany, Robert Denty, CDC/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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